In the following days, Lin Feng added or deleted the potion materials little by little, neutralizing the violent energy brought by the potion. Finally, he succeeded in finding an almost perfect ratio of medicines, eliminating all the adverse reactions of ordinary people after drinking. Well, the first person to drink the perfect finished product was his little maid Shui Rou, who said in horror.

In fact, Lin Feng was also kind, he decided to return to the territory recently, and this return trip required continuous and rapid travel. Shui Rou's body is not so good, and it is not good to be sick on the road. In other words, Lin Feng, a lazy man, is now inseparable from Shui Rou's care.

After examining Shui Rou's body, Kalido can determine that her physical fitness has increased by at least fifty percent, although it cannot be compared with the physical fitness of junior professionals, but it is also much stronger than that of ordinary people, at least she is no longer prone to illness due to fatigue and weakness.

Carrido also specifically pointed out that long-term use of this medicine has the potential to further enhance the physical fitness of ordinary people, at least to the level of junior professionals, which greatly improves the body of ordinary people, greatly improves their immunity and tolerance, and can even increase the life span of ordinary people to a limited extent.

After Lin Feng heard this, he said in his heart: "If you are not sick or sick, of course you will live longer with such physical fitness." However, Carrido's words really gave Lin Feng a big surprise.

The general meaning of Kalido's words is that there are many nobles now who are not professionals, and their weak bodies urgently need such a potion, and the elixir you have improved and developed has great market potential, in a word, "Boy, you are going to send it!"

Lin Feng was very excited when he heard this, "Brother is the time when he is short of money", but after the excitement, he calmed down, frowned, and was worried.

Seeing that his student restrained himself so quickly, and obviously thought of the key issue, Carrido couldn't help but nod secretly, "I still accepted a rational and intelligent student, and I realized it so quickly."

Why is Lin Feng worried, without him, his strength is too weak, and he can't keep such a big benefit at all. As long as the news of this potion leaks out, the various forces that have heard the wind will never stop until Lin Feng swallows it to the bone.

Carrido finally said to Lin Feng: "I have encountered the same situation as you before, but at that time, my improved potion was not as influential as yours, and even then, I also encountered a lot of troubles."

Looking at Lin Feng's eyes, Carrido directly said the answer: "Go to the Pharmacists Union to register a patent, although you will lose most of your interests after registering a patent, you will still have a certain amount of benefits, and you will also get honors, and more importantly, you can put an end to some unnecessary peeping, so as to stay away from the danger in the dark." ”

After Lin Feng heard this, he also reluctantly accepted it, the situation is stronger than people.

Carrido took Lin Feng directly to the branch of the Pharmacist Union in the imperial capital, and the staff here were still familiar with Carrido, a senior pharmacist. With his guarantee and recommendation, the efficiency of the pharmacists' union is still quite high, and it only took half a day to verify and prepare the finished drug.

As the inventor of the improved potion, Lin Feng obtained the right to name it, and Lin Feng didn't think much about it, so he directly named it: Physique Elixir. Anyway, it's based on the stamina potion. Well, the well-known physique elixir that was popular among ordinary people in the future was so easily named.

After going through all the formalities, and finally receiving the badge symbolizing the pharmacist and a magic crystal card handed over by the staff of the pharmacist's union, Lin Feng's one-day trip to the pharmacist's union ended.

The Apothecary's badge is an essential thing for an alchemist apothecary, and the pharmacist can use the badge to buy ordinary herbs at affordable prices in the Apothecary's Guild, and of course, there is also the opportunity to buy all kinds of rare herbs.

As for the magic crystal card, it is the income of Lin Feng's registered patent, Lin Feng handed over his improved formula to the pharmacist union, and the union will make it public internally, and every pharmacist who learns the formula of the potion must pay a certain amount of gold to the union.

If anyone wanted to make the potion on a large scale for sale, he would also have to pay one percent of his income to the union. Well, it's still a relatively low price. Trade unions, on the other hand, provide guarantees to patent registrants to protect their reasonable income. Half of the money received by the union is usually given to the patentee, and the other half is owned by the union.

On the one hand, it protects the interests of the vast majority of pharmacists from being stolen by others, and on the other hand, it also helps to promote and popularize new drugs, after all, thousands of pharmacists at the same time prepare and sell new drugs, which is much stronger than a monopoly by one person.

Lin Feng looked at the magic crystal card in his hand, there were 10,000 gold coins in it, he could take out the money at any time from the various offices of the pharmacist union, if there was no pharmacist's office in the local area, Lin Feng could also go to the mercenary union or the mage union to get it, but it was just to pay some more fees.

This 10,000 gold coins is not the income from the sale of medicines, it is just a special reward given by the pharmacists' union to the patentee according to the market prospect of the patentee's invention, well, it is a one-time and encouraging, even if no one buys your invention, there must be a reward. Whimsy always inspires others, this is one of the famous sayings of the pharmacists' union.

If someone buys a formula in a union and uses the formula to produce a finished potion, then the income will be included in the patentee's magic crystal card every month, which is a stable income, well, a fifty-year limitation period, which can be transferred to the designated heir. Professionals generally live longer, and 50 years is the most suitable period.

Carrido and Lin Feng only returned to the academy to report after completing the patent registration, which was also to cook the raw rice first, and the result of the wooden boat could always avoid a lot of trouble. With interests at the forefront, he had to be cautious, and this was also the life experience that Carrido wanted to teach Lin Feng through this incident.

Everything was perfect, the academy commended Lin Feng, and at the same time praised Kalido, on the surface, everyone accepted this result very peacefully, how harmonious? As for the envy and jealousy in secret, Carrido didn't see it, and Lin Feng was almost out of sight, because he was about to return home.

Well, just like Lin Feng said to the academy, "I am a baron, I must be responsible for my people, how can I only take care of myself and enjoy the happiness of the imperial capital? I should go back and use what I have learned to improve their lives and lead them to maintain the due reverence for magic." Of course, few people take these words seriously.